Feed tube for centrifuges



A. E. FLOWERS ET AL FEED TUBE FOR CENTRIFUGES Jan. 15, 1935.

Filed on. 1s, 1932 Patented Jan. 15, 1935 UNITEDsTTl-js 4s{PnlENT'OFFICE Y FEED Fon voEN'rRI'FUGlas. t ,Alan E. Flowers and George j.Strezynski, Poughkeepsie, N. Y., assignors to-TheDe Laval SeparatorCompany, New York, N. Y., a corporation 1 of New Jersey ApplicationvOctober 18, `1932, Serial No.'1638,2'74'Y I0 Claims. (01233-455) In apatent issued May 2', 1933, No.- 1,906,457, there are set forth astationary feed tube adapted to discharge feeding liquid-v into thereceiving chamber'o'f arapidlyrevolving centrifugal bowl together withstationary means to impart to the discharging liquid a high speed ofrotation in a direction corresponding to the direction of rotation ofthe centrifuge, thereby reducing emulsication by impact of rapidlymoving bowl parts upon slow moving liquids.

The present invention is a modification of the invention of saidapplication, the object being to secure results which, in some cases,particularly in centrifugal bowls having receiving chambers of smalldiameters, are better than those obtainable in the specific constructiondisclosed in said application.

We have found that such improved results, particularly with bowls of thecharacter specified, may be secured if the streams of liquid have across section relatively great vertically and relatively smallhorizontally and have also a considerable downward component in theirmovement. Our invention consists of means for producing such streams.

In the accompanying drawing, which illustrates a preferred embodiment ofour invention:

Fig. 1 is a side View, partly in section, of our improved feed tube.

Fig. 2 is a cross section thereof on the line 2--2 of Fig. l.

Fig. 3 is a side view approximately at right angles with Fig. 1.

Within the stationary feed tube a is inserted from the bottom astationary conical spreader b. In the tube are two longitudinal cutsproviding tongues c that are turned inward, making tangential outlets d.The lower ends of the tongues may contact with the spreader, as shown.From the outlets d the liquid is discharged into a receiving chamber e,whchconstitutes, or communicates with, the separating or purifying spaceof the centrifugal bowl.

Liquid flowing down the tube a strikes the cone b which causes it toturn outward and escape through the openings in a tangential stream witha downward component as indicated by lines f, Figure 3.

The proper functioning of the device does not require that the outletshall be strictly vertical as shown, since the outlet may have otheroperative contours.

While in the claims I have set forth means for discharging a singlestream of liquid from the feed tube to the receiving chamber, it will bevunderstood that I do not mean to exclude thereby `provision fordischarging any number of separate streams ;v, for example, two stre anddescribed. Y. ,I

What I claim and desire to protect by Letters Patent is:

l. In a centrifugal machine, the combination with a rotatable receivingchamber, of an upright feed tube extending within and located centrallyof said receiving chamber and having therein an outlet to the receivingchamber, and means, respectively within the tube and carried by the tubewall, adapted to cooperate to effect the discharge of liquid throughsaid outlet in thin tangential streams having greater vertical thanhorizontal dimensions.

2. In a centrifugal machine, the combination with a rotatable receivingchamber, of a relatively stationary feed tube extending within andlocated centrally of said receiving chamber and provided with atangential discharge opening having a substantially greater height thanwidth, and within the tube a spreader adapted to impart to the feedliquid throughout a substantial height an outward movement toward saidoutlet, thereby effecting the discharge of a tangential stream ofsubstantial height and with a downward component.

'3. In a centrifugal machine, the combination ams, as shown with arotatable receiving chamber, of a relatively stationary upright feedtube extending within and located centrally of said receiving chamberand having a side outlet whose vertical dimension is greater than itshorizontal dimension, and a spreader within the tube adapted to directthe downwardly flowing feed liquid outward toward said outlet.

4. In a centrifugal machine, the combination with a rotatable receivingchamber, of a relatively stationary upright feed tube having a sideoutlet, a tongue extending obliquely inward from one upright edge of theoutlet and a spreader within the tube.

5. In a centrifugal machine, the combination with a rotatable receivingchamber, of a relatively stationary upright feed tube having a sideoutlet, a tongue extending obliquely inward from one upright edge of theoutlet, and within the tube a spreader having a smooth conical faceadapted to direct the liquid toward said outlet.

6. In a centrifugal machine, the combination with a rotatable receivingchamber, of a relatively stationary upright feed tube having a sideoutlet, a tongue extending obliquely inward from one upright edge of theoutlet, and Within the tube a spreader having a conical face with whichthe lower part of said tongue contacts.

7. In a centrifugal machine, the combination with a. rotatable receivingchamber, of a feed tube extending downward toward said chamber and thewall of which is cut along a long line vertically andalong short lineslaterally to provide a tongue, said tongue being bent obliquely iiiward,and a spreader within the tube adapted to direct feed liquid downwardand outward toward the narrow elongated space between the free end ofthe tongue and the tube wall;

8. In a centrifugal machine, the combination with a rotatable receivingchamber adapted to discharge feeding liquid into a bowl of relativelirlarge diameter, of a relatively stationary upright feed tube extendingwithin and located centrally of said receiving chamber, said tube havinga vside outlet, opening into said receiving chamber, whose verticaldimension is substantially greater than its horizontal dimension, andmeans acting upon downowing feed liquid to cause the iet of liquidthrough said outlet to be approximately tangential to the tube.

9. In a centrifugal machine, the combination with a rotatable receivingchamber adapted to discharge feeding liquid into a bowl of relativelylarge diameter, of an upright feed tube extending within and locatedcentrally of said receiving chamber, and means acting upon feed liquiddown-flowing through the tube to cause liquid to discharge from' thetube into the receiving chamber in thin streams tangential to the tubeand having substantially greater vertical than horizontal dimensions.

10. In a centrifugal machine, the combination with a rotatable receivingchamber adapted to discharge feeding liquid into a bowl of relativelylarge diameter, of an upright feed tube extending within and locatedcentrally of said receiving chamber, and means acting upon feed liquiddownlowing through the tube to cause liquid to discharge from the tubeinto the receiving chamber in a thin tangential stream having asubstantially greater' vertical than horizontal dimension and havingalso a downward component.

ALAN E. FLOWERS. GEORGE J. STREZYNSKI.

